# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI=6

PYTHON_COMPAT=( python{2_7,3_3,3_4,3_5} )

inherit git-r3 python-r1

DESCRIPTION="Unreal Engine 4 is a suite of game development tools"
HOMEPAGE="https://www.unrealengine.com/"
EGIT_REPO_URI="https://github.com/EpicGames/UnrealEngine.git"
if use promoted ; then
	EGIT_BRANCH="promoted"
else
	EGIT_BRANCH="master"
fi
EGIT_CHECKOUT_DIR="${WORKDIR}/unrealengine"

LICENSE="unrealengine-4-license"
SLOT="0"
KEYWORDS="~amd64 -x86"
IUSE="+promoted"
#UE4Client UE4Editor UE4Game UE4Server BlankProgram BuildPatchTool CrashReportClient MinidumpDiagnostics CrossCompilerTool UnrealLaunchDaemon DsymExporter  ShaderCacheTool UE4EditorServices UnrealAtoS  ParallelExecutor ShaderCompileWorker SlateViewer  SymbolDebugger TestPAL UnrealCEFSubProcess  UnrealCodeAnalyzer UnrealFileServer UnrealFrontend  UnrealHeaderTool UnrealLightmass UnrealPak UnrealSync  UnrealVersionSelector BootstrapPackagedGame
#Debug DebugGame Shipping Test
#TODO: add make tagets as USE?

DEPEND=">=dev-lang/mono-3.1.0
	|| ( ~sys-devel/clang-3.3 >=sys-devel/clang-3.5 )
	app-text/dos2unix
	dev-util/cmake
	>=sys-libs/zlib-1.2.5[static-libs]
	>=dev-libs/jemalloc-3.6.0[static-libs]
	>=dev-cpp/libmcpp-2.7.2[static-libs]
	>=dev-libs/icu-53.1[static-libs]"
RDEPEND="x11-base/xorg-server
	media-libs/libsdl2
	|| ( ( >=x11-libs/gtk+-2.0 )
		( dev-qt/qtcore:4 dev-qt/qtgui:4 )
		( dev-qt/qtcore:5 dev-qt/qtgui:5 ) )
	>=media-libs/opus-1.1[static-libs]
	>=media-libs/libogg-1.2.2[static-libs]
	>=media-libs/libvorbis-1.3.2[static-libs]
	>=media-libs/freetype-2.4.12[static-libs]
	x11-misc/xdg-user-dirs"

S="${EGIT_CHECKOUT_DIR}"

create_link_if_not_exists()  {
	WrongName=$1
	CorrectName=$2

	pushd `dirname $CorrectName` > /dev/null || die
	if [[ ! -f `basename $CorrectName` ]] && [[ -f $WrongName ]]; then
	  echo "$WrongName -> $CorrectName"
	  ln -sf $WrongName `basename $CorrectName` || die
	fi
	popd > /dev/null || die
}

src_unpack() {
	elog "You have to register at unrealengine.com and in this profile you have to enter your github account name, so that epicgames grants you access to the repository"
	elog "Please follow instructions on https://www.unrealengine.com/ue4-on-github"
	git-r3_fetch
	git-r3_checkout
}

	src_prepare() {
	#./Setup.sh
	while : ; do
		mono Engine/Binaries/DotNET/GitDependencies.exe
		RESULT=$?

		echo "Result: $RESULT"
		# quit if not crashed
		[[ $RESULT -lt 129 ]] && break
		ewarn "mono GitDependencies.exe crashed with return code ${RESULT}. It will be restarted automatically."
	done
	# Fixes for case sensitive filesystem.
	einfo "Fixing inconsistent case in filenames."
	for BASE in Engine/Content/Editor/Slate Engine/Content/Slate Engine/Documentation/Source/Shared/Icons; do
		find $BASE -name "*.PNG" | while read PNG_UPPER; do
			png_lower="$(echo "$PNG_UPPER" | sed 's/.PNG$/.png/')"
			if [[ ! -f $png_lower ]]; then
				PNG_UPPER=$(basename $PNG_UPPER)
				echo "$png_lower -> $PNG_UPPER"
				# link, and not move, to make it usable with Perforce workspaces
				ln -sf `basename "$PNG_UPPER"` "$png_lower" || die
			fi
		done
	done

	create_link_if_not_exists ../engine/shaders/Fxaa3_11.usf  Engine/Shaders/Fxaa3_11.usf
	create_link_if_not_exists ../Engine/shaders/Fxaa3_11.usf  Engine/Shaders/Fxaa3_11.usf

	rm -f ../Engine/Binaries/Linux/libLND.so || die

	Engine/Build/BatchFiles/Linux/BuildThirdParty.sh -b HLSLCC || die
	#TODO patch for march

	#./GenerateProjectFiles.sh 
	xbuild Engine/Source/Programs/UnrealBuildTool/UnrealBuildTool.csproj \
	  /verbosity:quiet /nologo \
	  /p:TargetFrameworkVersion=v4.5 \
	  /p:Configuration="Development" || die

	# pass all parameters to UBT
	mono Engine/Binaries/DotNET/UnrealBuildTool.exe -makefile || die
}

src_compile() {
	einfo "Starting a compilation. That may take much time."
	emake StandardSet UE4Game
	einfo "Compilation finished."
}

src_install() {
	INSPATH="/opt/${PN}"
	DINSPATH="${ED}""${INSPATH#/}"/
	rm -rf "Engine/Intermediate" || die
	rm -rf "Engine/DerivedDataCache" || die
	mkdir -p "Engine/Intermediate" || die
	mkdir -p "Engine/DerivedDataCache" || die
	mkdir -p "${DINSPATH}" || die
	fperms +x /Engine/Binaries/Linux/UE4Editor

	cp -pPR Engine FeaturePacks Templates "${DINSPATH}" || die

	dodoc README.md
	newicon Engine/Source/Programs/UnrealVS/Resources/Preview.png "${PN}.png"
	make_desktop_entry "${INSPATH}/Engine/Binaries/Linux/UE4Editor -opengl4" "Unreal Engine 4 Editor" "${PN}.png" "Application" "Version=9999\nPath=${INSPATH}/Engine/Binaries/Linux \nTerminal=false"
}